[issue37330] open(): remove 'U' mode, deprecated since Python 3.3

[Łukasz Langa]

Łukasz Langa <lukasz at langa.pl> added the comment:


New changeset 19ba2122ac7313ac29207360cfa864a275b9489e by Victor Stinner in branch 'main':
bpo-37330: open() no longer accept 'U' in file mode (GH-28118)
https://github.com/python/cpython/commit/19ba2122ac7313ac29207360cfa864a275b9489e


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nosy: +lukasz.langa

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